A vehicle wheel (1) includes a rim (2) for mounting a tire thereon and at least one hollow air chamber (3) provided inside the rim (2), and the rim (2) having the air chamber (3) is integrally cast so as to have the vehicle wheel (1) having the rim (2) wit...

There is provided a surface treated product that moves relatively in a fluid, wherein a surface of the surface treated product has continuous dimples, each dimple having a diameter of 10 to 2500 mu m and a depth of 50 mu m or less. The surface treated prod...

An aluminum casting forged product is provided by using an aluminum alloy for casting forge including a useless raw material for forging such as flash as a raw material and by controlling a weight percentage of an alloy element such as silicon, magnesium, ...